Android devices not showing in Windows (MTP)

This has bugged me for a few generations of devices now and stumped me a few times...

Nexus 4, HTC One and Nexus 6 that I recall have had similar quirks - especially with later Windows versions (i.e. 8 and later)!

I've moved files off my Nexus 6 a few times since I got it late last year, and this time... it decides to not appear - but I could see it in device manager as an ADB device...

Found this article which explains a simple fix:

http://www.howtogeek.com/195607/how-to-get-your-android-device-to-show-up-in-file-explorer-if-it-isnt/

Basically device manager > Android ADB device > update driver > let me choose > USB MTP device > fixed